Update JikesRVM's boot image address (#170)

Update to mmtk/jikesrvm#20. This closes
#168.

Author: qinsoon

mmtk/Cargo.toml

@@ -16,7 +16,7 @@ lto = true
 [package.metadata.jikesrvm]
 # Our CI matches the following line and extract mmtk/jikesrvm. If this line is updated, please check ci yaml files and make sure it works.
 jikesrvm_repo = "https://github.com/mmtk/jikesrvm.git"
-jikesrvm_version = "a43efe4f33a6a69aabeb03e5c5e2e8880f96f047"
+jikesrvm_version = "1191b3846b6528011bce12996bbb5e15a23a043f"
 
 [dependencies]
 libc = "0.2"

mmtk/src/api.rs

@@ -64,7 +64,7 @@ pub extern "C" fn jikesrvm_gc_init(jtoc: *mut c_void, heap_size: usize) {
         builder
             .options
             .vm_space_start
-            .set(unsafe { Address::from_usize(0x6000_0000) });
+            .set(unsafe { Address::from_usize(0x7000_0000) });
         builder.options.vm_space_size.set(0x800_0000);
     }